Analysis
- max time kernel
137s - max time network
145s - platform
windows10_x64 - resource
win10v20201028 - submitted
26/02/2021, 21:13
Static task
static1
Behavioral task
behavioral1
Sample
23.xlsb
Resource
win7v20201028
0 signatures
0 seconds
Behavioral task
behavioral2
Sample
23.xlsb
Resource
win10v20201028
0 signatures
0 seconds
General
- Target 23.xlsb
- Size 81KB
- Sample210226-yf5ymkffcx
- SHA256 aed5f5bbec1f7f8ea9010f7388f76b801b443c5ce691d0c008b6058f290e51da
- MD5 3079d4778cfc7959eb2a7e54a57769a4
- SHA1 13074fe13d6dd531e4f5293c3e15eaa8ed6208a4
- SHA512 09a6cb132c84a015b504ce7e10c700dd4b78a36b1d514b4d8f92dca444017aec883a71600776e41ec9924f786cb9aed0256beccc541ac665566fd99875272eb5
- MD5 SHA1 SHA512
Score
10/10
Malware Config
Signatures
- Process spawned unexpected child process 1 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
description pid pid_target Process procid_target Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process 2004 728 rundll32.exe 67 - Checks processor information in registry 2 TTPs 3 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 EXCEL.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz EXCEL.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString EXCEL.EXE - Enumerates system info in registry 2 TTPs 3 IoCs
description ioc Process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU EXCEL.EXE Key opened \REGISTRY\MACHINE\Hardware\Description\System\BIOS EXCEL.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily EXCEL.EXE - Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 728 EXCEL.EXE - Suspicious use of SetWindowsHookEx 12 IoCs
pid Process 728 EXCEL.EXE 728 EXCEL.EXE 728 EXCEL.EXE 728 EXCEL.EXE 728 EXCEL.EXE 728 EXCEL.EXE 728 EXCEL.EXE 728 EXCEL.EXE 728 EXCEL.EXE 728 EXCEL.EXE 728 EXCEL.EXE 728 EXCEL.EXE - Suspicious use of WriteProcessMemory 2 IoCs
description pid Process procid_target PID 728 wrote to memory of 2004 728 EXCEL.EXE 81 PID 728 wrote to memory of 2004 728 EXCEL.EXE 81
Processes
-
C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\23.xlsb"1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:728 -
C:\Windows\System32\rundll32.exe"C:\Windows\System32\rundll32.exe" C:\ProgramData\qoqw\2427.dll,DllRegisterServer2⤵
- Process spawned unexpected child process
PID:2004
-